Defining precisely, the organic matter derived from biological
organisms (plants and animals) is called biomass. Bio-energy
can be defined as energy obtained from biological and renewable
sources (biomass); bio-energy may be derived in the form of
heat or transformed into electricity for distribution. Biomass also
can be transformed into biofuels, which are portable feedstock for
use in the generation of bio-energy. Biofuels are defined as feedstock
intended for the production of bio-energy, produced directly
or indirectly from biomass. Biofuels can be in solid form (fuel
wood, charcoal, wood pellets, briquettes, etc.) or liquid (bioethanol,
biodiesel).